//
//  AppDelegate.swift
//  KimboWeiBoSwift
//
//  Created by kimbo on 15/12/15.
//  Copyright © 2015年 kimbo. All rights reserved.
//

import UIKit
import SDWebImage

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    
    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        
        setupAppearance()//设置主题
        
        window = UIWindow(frame: UIScreen.mainScreen().bounds)
        
        window?.backgroundColor = UIColor.whiteColor()
        
        window?.rootViewController = defaultViewController()
        
        window?.makeKeyAndVisible()
        
        return true
    }
    
    //设置主题
    private func setupAppearance() {
        UINavigationBar.appearance().tintColor = UIColor.orangeColor()
    }
    
    /// 根据是否登录、是否新特性 来显示默认的控制器
    private func defaultViewController() -> UIViewController {
        if !KBUserAccount.userLogin {
            // 如果没有登录过
            return KBMainViewController()
        }
        
        return isNewFeature() ? KBNewFeatureViewController() : KBWelcomeViewController()
    }
    
    /// 判断是否是新版本
    private func isNewFeature() -> Bool {
     
        //1 获取当前版本
        let currentVersion = NSBundle.mainBundle().infoDictionary!["CFBundleShortVersionString"] as! String
        
        //2 获取上一次版本
        let versionKey = "versionKey"
        let previousVersion = NSUserDefaults.standardUserDefaults().objectForKey(versionKey) as? String
        
        let newVersion = currentVersion != previousVersion
        
        if newVersion { //是新版本才保存
            //3 保存当前版本
            NSUserDefaults.standardUserDefaults().setObject(currentVersion, forKey: versionKey)
            NSUserDefaults.standardUserDefaults().synchronize()
        }

        return newVersion
    }
    
    /// 切换根控制器(true切换KBMainViewController，false切换KBWelcomeViewController)
    private func mySwitchRootViewController(isMain: Bool) {
        window?.rootViewController = isMain ? KBMainViewController() : KBWelcomeViewController()
    }
    
    /// 提供外部选择根控制器
    class func switchRootViewController(isMain: Bool) {
        (UIApplication.sharedApplication().delegate as! AppDelegate).mySwitchRootViewController(isMain)
    }

    /// 当接收到内存警告时调用
    func applicationDidReceiveMemoryWarning(application: UIApplication) {
        let manager = SDWebImageManager.sharedManager()
        //1 取消下载
        manager.cancelAll()
        //2 清理缓存
        manager.imageCache.clearMemory()
    }
    
    func applicationWillResignActive(application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
    }

    func applicationDidEnterBackground(application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    }

    func applicationWillEnterForeground(application: UIApplication) {
        // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    }

    func applicationWillTerminate(application: UIApplication) {
        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    }
    


}

